For the past couple of months, I have been trying to update Adobe Reader for a Critical Security Alert. I go through the steps but the installation never completes. It just sits there with the bar at 95% complete for hours and hours. The file name trying to download is DLMUninst_001_OSX.dmg

I cannot open PDF files because I am not up to date on the newest versions. I get a blank page when I try to open one from some financial websites and others. My computer is an Apple MAC OSX v.10.5.8 PowerPC G5. I would really appreciate it if someone could solve this problem.